This report summarises the epidemiological investigations carried out in order to describe and explain the outbreak of H5N1 Low Pathogenic Avian Influenza (LPAI) infection in broiler breeder chickens on a premises in the administrative territory of Dunfermline, Scotland.

The report will be used to:(i) Provide evidence to support the UK’s position in successfully controlling the outbreak and as a declaration of freedom from H5N1 LPAI to both the EU and OIE and to inform trading partners, in full transparency, with a view to facilitate trade;(ii) provide source material for the technical annex for UK co-financing claims to theEU;(iii) record logistics and technicalities of the investigation and disease control to inform future resource planning, contingency plans and training requirements;(iv) and to highlight gaps in our understanding of notifiable avian influenza and so identify areas for further research or other needs.